Metal sheathed elements - used indoors or outdoors protected from the wind, in areas where physical abuse
is a problem. Quartz Tube and Quart Lamp used indoors and outdoors in areas where abuse is not a problem for snow
melting and spot heating.

Pigtail element leads for a more positive
connection on applications where physical abuse is a problem.

Corrosive Atmospheres - The
high quality finish and aluminized steel of the FRP series will give excellent
service under normal to severe operating conditions, including coastal salt air
and most industrial atmospheres. However for severe conditions such as swimming
pool, green houses, etc., the FRS stainless steel enclosure should be used.